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20130228
Search Results 0 to 11 of about 12 (some duplicates have been removed)
: ♪ ♪ moving our economy for 160 years. bnsf, the engine that connects us. >> and by the alfred p. sloan foundation. supporting science, technology, and improved economic performance and financial literacy in the 21st century. >> and with the ongoing support of these institutions and foundations. and... >> this program was made possible by the corporation for public broadcasting. and by contributions to your pbs station from viewers like you. thank you. >> brown: the man picked to lead the central intelligence agency was called today to defend his positions in the war on terror. john brennan's senate confirmation hearing revolved around several hotly debated policies. "newshour" congressional correspondent kwame holman has our report. >> reporter: even before the hearing got truly under way, protesters from code pink disrupted john brennan's opening statement-- signaling that passions were running high on the targeted killings of terror suspects. >> they won't even tell congress what countries we are killing children in. >> reporter: the interruptions continued, and the chair of the sena
angeles police office wanted for murder. >> suarez: we turn to iran as the u.s. tightens sanctions but tehran shows no signs of halting its nuclear program or engaging in talks. >> brown: from our american graduate series, we have the story of a chicago non-profit that aims to change the lives of would-be dropouts. >> what's interesting about one goal is that it pinpoints and targets low-income, underperforming students in non- selective chicago public schools, students who are least likely to graduate from high school, let alone college. >> suarez: we look at newly released documents showing leaders in the catholic church in los angeles shielded pedophile priests and failed to report allegations of child abuse. >> brown: and gwen ifill talks with biographer jeanne theo- haris, who offers a complex portrait of the woman best known for refusing to give up her seat on an alabama bus in 1955. >> she is celebrated for one act and i think part of that celebration puts it all in the past, right, when the actual rosa parks keeps working on racial and social justice issues all the way up t
was half the size of a football field. it passed, we can happily report, without incident. here to tell us about both events is astrophysicist and author neil degrasse tyson, director of the hayden planetarium in new york city. let's start with what happened in russia. how unusual was that in terms of size and impact? >> well, we couldn't know precisely how common that would be. all we can do is sort of look back at other sort of reported such events. for example, there was an air blast that happened in the airspace over india and pakistan back in 1990s. which happened to occur while they were in intense conversations about their nuclear buildup of arm ament. and so such a blast mimics greatly what would happened with the nuclear blast. it is an instant deposit of energy in the atmosphere. and so forth nationally we were able to tell them, we, i mean people, my scientific brethren who study this, were able to tell them no, that was not somebody's first strike it was actually a cosmic event. so that was in the 1990s. and if this had happened over the pas civic, nobody would have noticed. >>
Search Results 0 to 11 of about 12 (some duplicates have been removed)

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